Here,no. Of moles of water in 54 g = given weight/molecular weight

=54/18

=3

So, no. Of molecules=avogadro no. ×no. Of moles

=(6.022×10²³)×3

= 18.066 ×10²³ molecules

Higher castes were invariably of higher economic status while lower castes were always witnessed lower in economic status. In modem age, this correlation is getting weaker as we see rich and poor people are equally found in every caste. In the hierarchy of caste system each caste has a specific place and social status. There has been a close correlation between social or caste status and economic status. The high' castes were almost invariably of high economic status. On the other hand, the “low' caste were almost always of low economic status.

The objectives are as follows : To provide chances for students to gain leadership skill, professional skills, qualification an even employment opportunity. To develop social qualities such as tolerance, sympathy, cooperation, group cohesion are developed among the participants during intramural tournament. 

The objectives of the Intramural Sports Program are to provide

• Opportunities for individual development through various activities.
• Opportunities for social contact and the development of lasting friendships.
• Leadership and fellowship opportunities through participation.

उत्तरी भारत में अनेक भौगोलिक क्षेत्र आते हैं। इसमें मैदान, पर्वत, मरुस्थल आदि सभी मिलते हैं। यह भारत का उत्तरी क्षेत्र है। प्रधान भौगोलिक अंगों में गंगा के मैदान और हिमालय पर्वतमाला आती है। यही पर्वतमाला भारत को तिब्बत और मध्य एशिया के भागों से पृथक करती है। उत्तरी भारत मौर्य, गुप्त, मुगल एवं ब्रिटिश साम्राज्यों का ऐतिहासिक केन्द्र रहा है। यहां बहुत से हिन्दू तीर्थ जैसे हरिद्वार,कुरूक्षेत्र, शाकम्भरी देवी सहारनपुर पर्वतों में गंगोत्री से लेकर मैदानों में वाराणासी तक हैं, तो मुस्लिम तीर्थ जैसे अजमेर आदि भी हैं। यहां विश्व धरोहर स्थल भी अनेक हैं, जैसे महाबोधि मंदिर, हुमायुं का मकबरा और सर्वश्रेष्ठ ताजमहल। भारत सरकार द्वारा परिभाषित उत्तरी और उत्तर-मध्य क्षेत्र में जम्मू एवं कश्मीर, हिमाचल प्रदेश, उत्तराखंड, हरियाणा, पंजाब, राजस्थान, उत्तर प्रदेश, बिहार तथा मध्य प्रदेश राज्य आते हैं। यहां के प्रमुख शहरों में नई दिल्ली, कानपुर, जयपुर, लखनऊ, इंदौर, लुधियाना, चंडीगढ़ आदि आते हैं। यहां बोली जाने वाली प्रमुख भाषाएं हैं हिन्दी, पंजाबी, कश्मीरी, डोगरी, उर्दु, अवधी, मैथिली, अंग्रेज़ी।

यहां के मैदान सिंधु, गंगा और ब्रह्मपुत्र नदियों द्वारा बहाकर लाए गए जलोढ़ निक्षेप से बना है। इस मैदान की पूर्व से पश्चिम लंबाई लगभग 3200 किलो मीटर है। इसकी औसत चौड़ाई 150 से 300 किलोमीटर है। जलोढ़ निक्षेप की अधकतम गहराई 1000 से 2000 मीटर है। उत्तर से दक्षिण दिशा में इन मैदानों को तीन भागों में बाँट सकते हैं भाभर, तराई और जलोढ़ मैदान। जलोढ़ मैदान को आगे दो भागों में बाँटा जाता है- खादर और बाँगर। भाभर 8 से 10 किलोमीटर चौड़ाई की पतली पट्टी है जो शिवालिक गिरिपाद के समानांतर फैली हुई है। उसके परिणामस्वरूप हिमालय पर्वत श्रेणियों से बाहर निकलती नदियाँ यहाँ पर भारी जल-भार, जैसे- बड़े शैल और गोलाश्म जमा कर देती हैं और कभी-कभी स्वयं इसी में लुप्त हो जाती हैं। भाभर के दक्षिण में तराई क्षेत्र है जिसकी चौड़ाई 10 से 20 किलोमीटर है। भाभर क्षेत्र में लुप्त नदियाँ इस प्रदेश में ध्रातल पर निकल कर प्रकट होती हैं और क्योंकि इनकी निश्चित वाहिकाएँ नहीं होती, ये क्षेत्र अनूप बन जाता है, जिसे तराई कहते हैं। यह क्षेत्र प्राकॄतिक वनस्पति से ढका रहता है और विभिन्न प्रकार के वन्य प्राणियों का घर है। तराई से दक्षिण में मैदान है जो पुराने और नए जलोढ़ से बना होने के कारण बाँगर और खादर कहलाता है।

According to the poet, heavenly bodies like the sun and the moon, the old and young trees, daffodils growing on the grass, clear springs of water that satiates the thirst for summer are the four things of beauty that add joy to our life.

Aim:

To identify the anionic radicals present in an inorganic mixture of salts by performing various test.

Qualitative analysis involves the detection and identification of acidic and basic radicals present in inorganic salts. Inorganic salts are formed by the reaction of acids and bases or acidic oxides with a base or basic oxides.

Some of the examples of the reaction of acids and bases or acidic oxides with a base or basic oxides are

NaOH + HCl → NaCl + H₂O

CO₂ + 2NaOH → Na₂CO₃ + H₂O

KOH + HNO₃ → KNO₃ + H₂O

2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

Continued.........

Click on the link:

<a href="https://ncert.nic.in/pdf/publication/sciencelaboratorymanuals/classXII/chemistry/lelm107.pdf" ping="/url?sa=t&source=web&rct=j&url=https://ncert.nic.in/pdf/publication/sciencelaboratorymanuals/classXII/chemistry/lelm107.pdf&ved=2ahUKEwjU4e_mua7tAhWLzDgGHUbgAi8QFjAQegQIHBAC" rel="noopener" target="_blank">systematic qualitative analysis - ncert</a>

Use the given formulas:

(a) Revenue Deficit = Revenue Expenditure − Revenue Receipts

(b) Fiscal Deficit = Revenue Expenditure + Capital Expenditure− Revenue Receipts− Capital Receipts net of Borrowings

(c) Primary Deficit = Fiscal Deficit − Interest Payments

Nuclear Reactor

• Nuclear reactors are useful in producing electricity.
• A nuclear reactor is an arrangement to generate electricity whichmakes use of nuclear fission.

Requirements for controlled nuclear fission in reactor:

1. Neutrons to be slowed down.

• Neutrons are slowed down by using moderators which are lighter nuclei which slow down fast moving neutrons by elastic collision.
• Commonly used moderators:-

1.Water

1. Heavy Water
2. Graphite

• Consequence of use of moderators:-
  1. Multiplication factor of neutrons increases: - When a neutron hits a target nucleus along with daughter nucleus,it produces 3 neutrons.These 3 neutrons are highly energetic but they need to be slowed down, so they can hit the target nucleus.
  2. As a result high multiplication factor results in uncontrolled chain reaction.

Saheb’s full name is “Saheb-e-Alam”. It means the lord of the universe. He does not know it. If he knew it, he would hardly believe it. He roams the streets barefoot with other rag-pickers. This army of arefoot boys appears in the morning and disappears at noon.

When a slow dry current(stream) of oxygen is passed through silent electrical discharge, oxygen gets converted to ozone(about 10%). The product is known as ozonised oxygen.

 3O₂       →   2O₃    

It is an endothermic process. Use of a silent discharge is important in its preparation to prevent its decomposition

An electrostatic field line is a continuous curve because a charge experiences a continuous force when traced in an electrostatic field. The field line cannot have sudden breaks because the charge moves continuously and does not jump from one point to the other.

 The crofter had told the peddler that by supplying his cow’s milk to the creamery, he had received thirty kronor in payment. The peddler seemed to doubt it. So, in order to assure his guest of the truth, he showed the thirty kronor to the peddler.

cause (someone) to believe firmly in the truth of something.

Convince means to talk someone into something, or win someone over. A person convinces by making an argument—you can convince your parents to let you go to the movies by promising you'll do all your homework the next day.

Solenoid is a long coil containing large number of close turns of insulated copper wire. 

Given below is the diagram of solenoid: 

The magnetic field inside a solenoid, B∝n,where, n is the number of turns in coil per unit length of the solenoid.

Hence, when the number of turns in coil increases, n increases, and resultantly B increases.

We possess the evil qualities of malice and disappointment. We suffer from the lack of noble qualities. That is why we feel despondent

According to the valence bond theory, Electrons in a molecule occupy atomic orbitals rather than molecular orbitals. The atomic orbitals overlap on the bond formation and the larger the overlap the stronger the bond.

The important postulates of the valence bond theory are listed below.

1. Covalent bonds are formed when two valence orbitals (half-filled) belonging to two different atoms overlap on each other. The electron density in the area between the two bonding atoms increases as a result of this overlapping, thereby increasing the stability of the resulting molecule.
2. The presence of many unpaired electrons in the valence shell of an atom enables it to form multiple bonds with other atoms. The paired electrons present in the valence shell do not take participate in the formation of chemical bonds as per the valence bond theory.
3. Covalent chemical bonds are directional and are also parallel to the region corresponding to the atomic orbitals that are overlapping.
4. Sigma bonds and pi bonds differ in the pattern that the atomic orbitals overlap in, i.e. pi bonds are formed from sidewise overlapping whereas the overlapping along the axis containing the nuclei of the two atoms leads to the formation of sigma bonds.